KR20230052402A - Tension equalization device of continuous fiber composite manufacturing apparatus, apparatus and method for manufacturing continuous fiber composite - Google Patents

Abstract

The present invention relates to a tension equalization device of a continuous fiber composite material manufacturing apparatus, a continuous fiber composite material manufacturing apparatus, and a continuous fiber composite material manufacturing method. According to one embodiment of the present invention, the continuous fiber composite material manufacturing apparatus comprises: a fiber supply unit including a plurality of bobbins supplying a plurality of fibers; a spreading unit which spreads the plurality of fibers supplied from the fiber supply unit to a set width; and an impregnation unit which impregnates the plurality of spread fibers with a resin. The tension equalization device has a nip roll which is located on a path through which the plurality of fibers are transferred to the impregnation unit, and presses the plurality of fibers in a vertical direction and rotates to uniformly adjust the tension of the entirety of the plurality of fibers. According to the present invention, the continuous fiber composite material manufactured thereby has improved quality.

Description

Tension equalization device of continuous fiber composite manufacturing device, continuous fiber composite manufacturing device and method

Embodiments of the present invention relate to a tension equalization device of a continuous fiber composite manufacturing device, and a continuous fiber composite manufacturing device and method.

Continuous fiber composites have recently been in the limelight as industrial materials in relation to automobiles, aviation, electronics, construction, sports leisure and defense industries, and have the advantage of being able to change their composition relatively freely in the molding process.

Continuous fiber composites are continuously produced by impregnating continuously supplied fibers with a resin and undergoing a curing or solidifying process. For example, unidirectional continuous fibers are continuously manufactured by impregnating fibers in a thermoplastic resin in one direction.

UD sheet has excellent mechanical properties and is mainly used as a reinforcing material for parts with low physical properties of injection molded products.

In the conventional continuous fiber composite manufacturing apparatus, the fiber tension is individually adjusted in the process of supplying the fibers using a mechanical creel, which is a device in which the fibers are wound.

1 is a conceptual diagram of a fiber supply unit of a conventional continuous fiber composite manufacturing apparatus. Referring to FIG. 1, the conventional fiber supply unit 30 has a structure that unwinds and supplies a plurality of fibers horizontally. The conventional fiber supply unit 30 is provided with a mechanical creel 20 that individually adjusts the tension of the fibers.

2 is a schematic diagram showing a conventional mechanical creel. Referring to FIG. 2 , a mechanical creel 20 is configured to mechanically adjust the tension of a fiber GF (eg, glass fiber, etc.) using a spring 21 and a leather strap 22 .

However, in the case of the conventional mechanical creel 20, there was a disadvantage in that individual fiber tension deviations occurred. As such, in the prior art, the tension of the entire plurality of fibers is not uniform, resulting in deterioration in quality and mechanical properties of the UD sheet.

Prior literature related to the present invention includes Republic of Korea Patent Publication No. 10-2019-0069289 (2019.06.19. Publication date), and a fiber tension adjusting device, a fiber-reinforced composite manufacturing device including the same, and technology related to the manufacturing method This is disclosed. According to prior literature, a configuration for individually adjusting the tension of fibers is only disclosed, and a method for improving the tension deviation of the entire plurality of fibers is not suggested at all.

Republic of Korea Patent Publication No. 10-2019-0069289

An object of the present invention is to provide a tension equalization device of a continuous fiber composite manufacturing device capable of improving the quality and mechanical properties of the continuous fiber composite.

Another object of the present invention is to provide a continuous fiber composite manufacturing apparatus capable of improving the quality and mechanical properties of the continuous fiber composite.

Another object of the present invention is to provide a continuous fiber composite manufacturing method capable of improving the quality and mechanical properties of the continuous fiber composite.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

According to one aspect of the present invention, a tension equalization device of a continuous fiber composite manufacturing device capable of improving the quality and mechanical properties of the continuous fiber composite is provided.

An apparatus for equalizing tension of a continuous fiber composite manufacturing apparatus according to an embodiment of the present invention includes a fiber supply unit including a plurality of bobbins for supplying a plurality of fibers; a spreading unit for spreading the plurality of fibers supplied from the fiber supply unit to a set width; And an impregnation unit for impregnating the plurality of spread fibers with a resin; a tension equalization device of a continuous fiber composite manufacturing apparatus comprising a resin, wherein the tension equalization device is located on a path through which the plurality of fibers are transported to the impregnation unit. And, a nip roll that presses and rotates the plurality of fibers up and down to uniformly adjust the tension of the entire plurality of fibers; includes.

At this time, after uniformly adjusting the tension of the entire plurality of fibers by the nip roll, the plurality of fibers having the tension uniformity adjusted may be supplied to the impregnation unit with a desired tension.

Specifically, the intensity (ie, intensity) of the tension can be adjusted by the process line speed ratio.

For example, when the rotational speed of the nip roll is A and the process line speed is B,

When A = 10.1 m/min and B = 10 m/min, the total fiber tension is 0,

If A = 9.9 m/min, B = 10 m/min, the total fiber tension is a (tension is generated by the process wire speed ratio),

When A = 9.8 m/min and B = 10 m/min, the total fiber tension b (b > a) can be obtained.

In this way, the tension equalization device (ie, the nip roll) can make it possible to control the tension of the entire fiber as well as equalize the fiber tension (b>a>0).

The nip roll may be positioned between the fiber supply unit and the impregnation unit.

In addition, the nip roll is located between the exit side of the spreading part and the inlet side of the impregnating part, and can simultaneously press the plurality of fibers spread to the set width vertically and downward.

For example, the reinforcing fibers (GF) may be composed of 4,000 strands of glass fiber filaments (12 to 24 micrometers).

At this time, the tension equalization device, more specifically, the nip roll does not equalize the individual tension of the 4,000 strands of glass fiber filaments, but equalizes the tension of the reinforcing fiber bundle made of 4,000 strands of glass fiber filaments. It is possible to uniformize the fiber tension of a plurality of bobbins.

In addition, since the nip roll is positioned between the spreading unit and the impregnating unit, it can be supplied to the impregnating unit immediately after the tension deviation of the entire plurality of fibers is improved through the nip roll, so that the impregnation property can be further improved.

In addition, the nip roll may include a first nip roll that rotates to press the upper portion of the plurality of fibers; and a second nip roll rotating to press the lower portions of the plurality of fibers.

Here, one of the first and second nip rolls may be a rubber nip roll having a surface made of a rubber material, and the other one of the first and second nip rolls may be a steel nip roll having a surface made of a steel material. If both the first and second nip rolls are rubber nip rolls, there is a problem in that a fiber curl phenomenon occurs when a plurality of fibers pass through the first and second nip rolls. Conversely, when both the first and second nip rolls are made of steel, there is a problem in that a fiber single yarn phenomenon in which fibers are cut when a plurality of fibers pass through the first and second nip rolls occurs. And, when one of the first and second nip rolls is a rubber nip roll and the other is a steel nip roll, the tension of the plurality of fibers can be adjusted by adjusting the rotational speed ratio of the process line speed and the first and second nip rolls, It is possible to prevent fiber curling and fiber breakage in advance, thereby preventing fiber damage.

The tension equalization device of the continuous fiber composite manufacturing apparatus according to an embodiment of the present invention is located in a direction in which the plurality of fibers are introduced toward the first and second nip rolls, and the plurality of fibers are disposed in the first and second nip rolls. A first guide bar for guiding the angle introduced toward the roll; further includes.

Among the first and second nip rolls, the first guide bar may be positioned at a height closer to a steel nip roll having a surface made of a steel material than a rubber nip roll having a surface made of a rubber material. Accordingly, when the plurality of fibers are introduced toward the first and second nip rolls, the first and second nip rolls are positioned at a height closer to the steel nip rolls than the rubber nip rolls at the inlet side of the first and second nip rolls. By flowing through the bottom of one guide bar, a plurality of fibers can pass between the first and second nip rolls to have a larger contact area with the steel nip rolls than with the rubber nip rolls. As a result, a fiber curling phenomenon that may occur due to an excessive contact area toward the rubber nip roll can be prevented. In addition, the height of the first guide bar may be adjusted within a height range between the center of the first and second nip rolls, the surfaces of which are made of steel, and gaps between the first and second nip rolls. An input angle of fibers introduced toward the first and second nip rolls may be inclined toward the steel nip rolls according to the height of the first guide bar. As a result, it is possible to adjust the input angle of the fiber so that the contact area of the fiber can be further increased in the steel nip roll compared to the rubber nip roll among the first and second nip rolls, and the fiber curling phenomenon in which the fiber is rolled toward the rubber nip roll has not been observed. can be prevented in

The tension equalization device of the continuous fiber composite manufacturing apparatus according to an embodiment of the present invention is located in a direction in which the plurality of fibers are discharged through the first and second nip rolls, and the plurality of fibers are disposed in the first and second nip rolls. 2; a second guide bar for guiding the angle discharged from the nip roll; further includes.

Among the first and second nip rolls, the second guide bar may be positioned at a height closer to a steel nip roll having a surface made of a steel material than a rubber nip roll having a surface made of a rubber material. Accordingly, when the plurality of fibers are discharged after passing through the first and second nip rolls, located at a height closer to the steel nip roll than the rubber nip roll at the exit side of the first and second nip rolls By flowing through the lower portion of the second guide bar, a plurality of fibers may pass between the first and second nip rolls to have a larger contact area with the steel nip rolls than with the rubber nip rolls. As a result, a fiber curling phenomenon that may occur due to an excessive contact area toward the rubber nip roll can be prevented. The height of the second guide bar may be adjusted within a height range between the center of the first and second nip rolls, the surfaces of which are made of steel, and gaps between the first and second nip rolls. Depending on the height of the second guide bar, a discharge angle of fibers discharged from the first and second nip rolls may be inclined toward the steel nip rolls. As a result, it is possible to adjust the discharge angle of the fibers so that the contact area of the fibers can be further increased in the steel nip rolls compared to the rubber nip rolls among the first and second nip rolls, and the curling of the fibers towards the rubber nip rolls has not been observed. can be prevented in In particular, when the first and second guide bars are located before and after the first and second nip rolls at the same time, the input angle of the fibers introduced toward the first and second nip rolls and the discharge angle of the fibers discharged from the first and second nip rolls By simultaneously controlling the fibers, it is possible to more effectively prevent fiber curling that may occur due to excessive contact of the fibers with the rubber nip roll.

In addition, the first nip roll and the second nip roll may be spaced apart from each other in the same center so as to face each other vertically with the plurality of fibers interposed therebetween.

In addition, the first nip roll and the second nip roll may rotate at the same speed.

In addition, the first nip roll and the second nip roll may have the same diameter.

In addition, the first nip roll and the second nip roll may be formed to be longer than a width size at which the plurality of fibers are spread. Accordingly, while the plurality of fibers spread to a set width simultaneously pass between the first nip roll and the second nip roll, the total tension can be equalized.

According to another aspect of the present invention, a continuous fiber composite manufacturing apparatus capable of improving the quality and mechanical properties of the continuous fiber composite is provided.

An apparatus for manufacturing a continuous fiber composite according to an embodiment of the present invention includes a fiber supply unit including a plurality of bobbins for supplying a plurality of fibers; a spreading unit for spreading the plurality of fibers supplied from the fiber supply unit to a set width; an impregnation unit for impregnating the spread fibers with a resin; And a nip roll located on a path through which the plurality of fibers are transported to the impregnation unit, pressing and rotating the plurality of fibers up and down, and uniformly adjusting the tension of the entire plurality of fibers. It includes; tension equalization device.

In addition, it includes; individual tension control unit for adjusting the individual tension of the fibers supplied from each of the plurality of bobbins.

Another aspect of the present invention provides a continuous fiber composite manufacturing method capable of improving the quality and mechanical properties of the continuous fiber composite.

A continuous fiber composite manufacturing method according to an embodiment of the present invention includes a fiber supply step of supplying a plurality of fibers; a spreading step of spreading the plurality of fibers supplied in the fiber supply step to a set width; And an impregnation step of impregnating the plurality of spread fibers with a resin; including, after the fiber supply step, using a nip roll that rotates while pressing the plurality of fibers up and down, the plurality of A tension equalization step of uniformly adjusting the tension of the entire fiber; further includes.

According to the present invention, quality improvement of the continuous fiber composite material can be expected, and there is an advantage that significant improvement in mechanical properties is possible.

According to the present invention, it is possible to improve the individual fiber tension deviation of the existing mechanical creel, using up and down rotating nip rolls disposed before and after spreading, before a plurality of fibers are introduced into the impregnation process. It has the advantage of being able to equalize the overall tension.

According to the present invention, unlike the conventional method of adjusting the tension of each of a plurality of bobbins in the fiber supply process, the tension of a plurality of fibers can be simultaneously adjusted at once before and after the spreading process after the fiber supply process. As a result, it is possible to improve the quality and mechanical properties of the final product, that is, the continuous fiber composite, that is, the UD sheet.

In addition to the effects described above, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a view briefly showing a schematic appearance of a conventional fiber supply unit.
2 is a schematic diagram showing a conventional mechanical creel.
3 is a conceptual diagram briefly showing the overall configuration of a continuous fiber composite manufacturing apparatus including a tension equalization apparatus according to an embodiment of the present invention.
4 is a conceptual diagram of a tension equalization device of a continuous fiber composite manufacturing device according to an embodiment of the present invention.
5 is a conceptual diagram briefly illustrating a disposition structure of first and second nip rolls and first and second guide bars according to an embodiment of the present invention.
6 is a three-dimensional conceptual diagram illustrating an arrangement structure of first and second nip rolls and first and second guide bars according to an embodiment of the present invention.
7 is a flow chart of a continuous fiber composite manufacturing method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification. In addition, some embodiments of the present invention are described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element is or may be directly connected to that other element, but intervenes between each element. It will be understood that may be "interposed", or each component may be "connected", "coupled" or "connected" through other components.

In addition, in implementing the present invention, components may be subdivided for convenience of explanation, but these components may be implemented in one device or module, or one component may be implemented in a plurality of devices or modules. It may be divided into and implemented.

Continuous fiber composites are continuously produced by impregnating a continuously supplied fiber (eg, glass fiber) with a resin and going through a hardening or solidifying process.

Unidirectional continuous fibers are continuously manufactured by impregnating fibers in a thermoplastic resin in one direction, and this is referred to as a UD sheet (Unidirectional Sheet).

When manufacturing unidirectional continuous fibers, a creel that controls fiber tension has a great influence on the mechanical properties and surface quality of the material.

However, in the conventional mechanical creel (20, see FIGS. 1 and 2), the tension of the fiber is individually adjusted using a spring (21, see FIG. 2) and a leather strap (22, see FIG. 2).

According to this conventional method, there is a deviation in the tension of the fiber, and as a result, the quality of the fiber is lowered and the mechanical properties are deteriorated.

The present invention has been devised to improve individual fiber tension deviations and uniformize fiber tension by simultaneously adjusting the total tension of a plurality of fibers, a tension equalization device for a continuous fiber composite manufacturing device, a continuous fiber composite manufacturing device including the same, and Provided is a continuous fiber composite manufacturing method.

Hereinafter, with reference to the accompanying drawings, a tension equalization device of a continuous fiber composite manufacturing apparatus according to a preferred embodiment of the present invention, a continuous fiber composite manufacturing apparatus including the same, and a continuous fiber composite manufacturing method will be described in detail.

In the drawings, FIG. 3 is a conceptual diagram briefly showing the overall configuration of a continuous fiber composite manufacturing apparatus including a tension equalization apparatus according to an embodiment of the present invention. 4 is a conceptual diagram of a tension equalization device of a continuous fiber composite manufacturing apparatus according to an embodiment of the present invention, and FIGS. 5 and 6 are first and second nip rolls and first and second nip rolls according to an embodiment of the present invention. These are drawings briefly showing the arrangement structure of the guide bar.

According to one aspect of the present invention, the tension equalization device 300 of the continuous fiber composite manufacturing device 10 capable of improving the quality and mechanical properties of the continuous fiber composite is provided.

The continuous fiber composite manufacturing apparatus 10 according to an embodiment of the present invention includes a fiber supply unit 100, a spreading unit 200, and an impregnation unit 400.

The tension equalization device 300 of the continuous fiber composite manufacturing device 10 according to an embodiment of the present invention includes a nip roll 310.

The fiber supply unit 100 supplies a plurality of fibers. The fiber supply unit 100 includes a plurality of bobbins 110 for winding and storing a plurality of fibers and unwinding and supplying each of the plurality of fibers.

The spreading unit 200 spreads (ie, spreads) the plurality of fibers supplied from the fiber supply unit 100 to a set width.

The spreading unit 200 spreads a plurality of fibers supplied from each of the plurality of bobbins 110, for example, about 4,000 fibers to a set width.

The impregnation unit 400 is a device that receives a plurality of fibers spread in a set width by the spreading unit 200 and impregnates them with a resin.

For example, the impregnation unit 400 may be an impregnation mold for impregnating fibers and resin. The impregnation unit 400 may further include a resin supply unit (not shown) receiving resin.

The tension equalization device 300 is located on a path through which a plurality of fibers are transported to the impregnation unit 400, and rotates a plurality of fibers by pressing them in an up and down direction as a whole. include

The nip roll 310 uniformly adjusts the tension of the entire plurality of fibers before being supplied to the impregnation unit 400 . As a result, the individual tension deviation of the plurality of fibers may be improved before being put into the impregnation unit 400, and the tension of the fibers may be uniform.

On the other hand, according to an embodiment of the present invention, when fibers are supplied from the fiber supply unit 100, that is, each of the plurality of bobbins 110, the individual tension adjusting unit 120 for pre-adjusting the individual tension of the fibers may be further included. can

For example, the individual tension adjusting unit 120 may be a conventionally known mechanical creel, or may be a device using a separate driving source, for example, a driving motor.

As an example, the individual tension control unit 120 may include a shaft installed in the form of a column at the center of the bobbin 110, a drive motor for driving the shaft, and a controller for controlling the drive motor.

In the tension equalization device 300 according to an embodiment of the present invention, the tension of the entire plurality of fibers is uniformly adjusted by the rotational speed of the nip roll 310 and the process line speed ratio, and then the plurality of fibers after tension uniformity control are impregnated It can be supplied to the unit 400.

The nip rolls 310 may be a pair of pressure roll devices that rotate while pressing up and down the entire plurality of fibers on the movement path of the fibers transported to be supplied to the impregnation unit 400 .

By the pressure and rotation of the nip roll 310, the individual tension deviation of each of the plurality of fibers passing through the nip roll 310 is improved, and the tension can be uniformed as a whole.

At this time, after uniformly adjusting the tension of the entire plurality of fibers by the nip roll, the plurality of fibers having the tension uniformity adjusted may be supplied to the impregnation unit.

Specifically, the intensity (ie, intensity) of the tension can be adjusted by the process line speed ratio.

For example, when the rotational speed of the nip roll is A and the process line speed is B,

When A = 10.1 m/min and B = 10 m/min, the total fiber tension is 0,

If A = 9.9 m/min, B = 10 m/min, the total fiber tension is a (tension is generated by the process wire speed ratio),

When A = 9.8 m/min and B = 10 m/min, the total fiber tension b (b > a) can be obtained.

In this way, the tension equalization device (ie, the nip roll) can make it possible to control the tension of the entire fiber as well as equalize the fiber tension (b>a>0).

In addition, in the tension equalization device 300 according to an embodiment of the present invention, the nip roll 310 may be positioned between the fiber supply unit 100 and the impregnation unit 400 .

Accordingly, the plurality of fibers released from the plurality of bobbins 110 of the fiber supply unit 100 are supplied to the impregnation unit 400 in a state in which the individual tension deviation is improved and the tension is uniformed before being supplied to the impregnation unit 400. can be supplied.

As a preferred example, the nip roll 310 is located between the outlet side of the spreading portion 200 and the inlet side of the impregnation portion 400, and spreads to a set width after passing through the spreading portion 200 A plurality of fibers can be pressed up and down.

For example, the reinforcing fibers (GF) may be composed of 4,000 strands of glass fiber filaments (12 to 24 micrometers).

At this time, the tension equalization device, more specifically, the nip roll does not equalize the individual tension of the 4,000 strands of glass fiber filaments, but equalizes the tension of the reinforcing fiber bundle made of 4,000 strands of glass fiber filaments. It is possible to uniformize the fiber tension of a plurality of bobbins.

In the tension equalization operation for the fibers, passing the nip roll 310 in a spread state is more effective in improving the tension deviation than passing the plurality of fibers through the nip roll 310 before spreading, and the entire plurality of fibers There is an advantage in uniformizing the tension of the

In addition, when the nip roll 310 is positioned between the spreading portion 200 and the impregnation portion 400, a plurality of fibers passing through the nip roll 310 and having improved individual tension deviations are directly impregnated portion 400 ), so that the impregnation property is further improved compared to the position of the nip roll 310 before the spreading unit 200, so that the quality and mechanical properties of the product are further improved.

As a specific example, the nip roll 310 includes a first nip roll 311 and a second nip roll 312 .

The first nip roll 311 rotates at a rotational speed set to press the upper portions of the spread fibers.

The second nip roll 312 is positioned below the first nip roll 311 and rotates at a rotational speed set to press the lower portion of the plurality of fibers spread under the first nip roll 311 .

Here, one of the first and second nip rolls 311 and 312 is a rubber nip roll having a rubber surface, and the other one of the first and second nip rolls 311 and 312 has a steel surface. Steel nip can be a roll

If all of the first and second nip rolls 311 and 312 are rubber nip rolls, a fiber curling phenomenon occurs when a plurality of fibers pass through the first and second nip rolls 311 and 312 .

Conversely, when all of the first and second nip rolls 311 and 312 are made of steel, a fiber single yarn phenomenon occurs when a plurality of fibers pass through the first and second nip rolls 311 and 312. there is

Accordingly, it is preferable that one of the first and second nip rolls 311 and 312 use a rubber nip roll, and the other one uses a steel nip roll.

As such, when one of the first and second nip rolls 311 and 312 is a rubber nip roll and the other is a steel nip roll, the rotational speed of the first and second nip rolls 311 and 312 and the process line speed ratio While adjusting the tension of the fiber by appropriately adjusting, it is possible to prevent the fiber curling phenomenon and the fiber single yarn phenomenon in advance.

As a specific example, the first nip roll 311 may be a rubber nip roll, and the second nip roll 312 may be a steel nip roll. In other words, the rubber nip roll refers to a nip roll that has at least a surface made of a rubber material to prevent fiber curling, and a steel nip roll refers to a nip roll that has at least a surface made of a steel material to prevent fiber breakage, and the entire steel material can be made with

In addition to this, the tension equalization device 300 according to an embodiment of the present invention further includes a first guide bar 330 and a second guide bar 350.

The first guide bar 330 is located in a direction in which the plurality of fibers are introduced toward the first and second nip rolls 311 and 312, and the plurality of fibers are disposed on the first and second nip rolls 311 and 312 It can guide the angle injected toward the .

Among the first and second nip rolls 311 and 312, the first guide bar 330 may be positioned at a height closer to a steel nip roll having a steel surface than a rubber nip roll having a rubber surface. .

Accordingly, when the plurality of fibers are fed toward the first and second nip rolls 311 and 312, the steel nip rolls are more than the rubber nip rolls at the inlet side of the first and second nip rolls 311 and 312. By flowing through the lower part of the first guide bar 330 located at a height closer to the first and second nip rolls 311, the plurality of fibers have a larger contact area with the steel nip rolls than with the rubber nip rolls , 312). As a result, a fiber curling phenomenon that may occur due to an excessive contact area toward the rubber nip roll can be prevented.

In addition, the height of the first guide bar 330 is the height between the center of the first and second nip rolls 311 and 312, the steel nip rolls having a steel surface, and the gap between the first and second nip rolls 311 and 312 can be adjusted within the range.

In this way, according to the height adjustment of the first guide bar 330, the input angle of the fibers introduced toward the first and second nip rolls 311 and 312 may be inclined toward the steel nip roll. Accordingly, the input angle of the fiber can be adjusted so that the contact area of the fiber can be further increased in the steel nip roll compared to the rubber nip roll among the first and second nip rolls 311 and 312, and the fiber is rolled toward the rubber nip roll Fiber curling can be prevented in advance.

The second guide bar 350 passes through the first and second nip rolls 311 and 312 and is positioned in a direction in which the plurality of fibers are discharged, and the plurality of fibers pass through the first and second nip rolls 311 and 312. 312) can guide the discharged angle.

Among the first and second nip rolls 311 and 312, the second guide bar 350 may be positioned at a height closer to the steel nip roll having a steel surface than the rubber nip roll having a rubber surface. .

Accordingly, when the plurality of fibers are discharged after passing through the first and second nip rolls 311 and 312, the steel is higher than the rubber nip roll at the exit side of the first and second nip rolls 311 and 312. By flowing through the lower part of the second guide bar 350 located at a height closer to the nip roll, the plurality of fibers have a larger contact area with the steel nip roll than the rubber nip roll First and second It can pass between the nip rolls 311 and 312. As a result, a fiber curling phenomenon that may occur due to an excessive contact area toward the rubber nip roll can be prevented.

In addition, the height of the second guide bar 350 is the height between the center of the first and second nip rolls 311 and 312, the surface of which is made of steel, and the gap between the first and second nip rolls 311 and 312. can be adjusted within the range.

In this way, the discharge angle of the fibers discharged from the first and second nip rolls 311 and 312 may be inclined toward the steel nip rolls according to the height of the second guide bar 350 . As a result, the discharge angle of the fibers can be adjusted so that the contact area of the fibers can be further increased in the steel nip rolls compared to the rubber nip rolls among the first and second nip rolls 311 and 312, and the fibers are rolled toward the rubber nip rolls. Fiber curling can be prevented in advance.

According to an embodiment of the present invention, when the first and second guide bars 330 and 350 are located before and after the first and second nip rolls 311 and 312 at the same time, the first and second nip rolls 311 and 312 ) It is possible to adjust the input angle of the fibers introduced toward the direction and the discharge angle of the fibers discharged from the first and second nip rolls 311 and 312 at the same time. As a result, excessive contact of the plurality of fibers to the first nip roll 311, that is, the rubber nip roll, can be prevented, thereby preventing fiber curling more effectively.

In addition, the first and second guide bars 330 and 350 may further include first and second guide bar height adjusting units 340 and 360 for adjusting the respective heights. The first and second guide bar height adjusting units 340 and 360 are formed at the center of the steel nip roll (referring to the second nip roll 312 in FIGS. 4 and 5) and the first and second nip rolls 311 having a steel surface. , 312), the height of each of the first and second guide bars 330 and 350 may be adjusted within a height range between the gaps. Accordingly, it is possible to more effectively prevent fiber curling by adjusting the contact area between a rubber nip roll (referring to the first nip roll 311 in FIGS. 4 and 5 ) and a plurality of fibers having a rubber surface.

On the other hand, referring to FIGS. 4 and 5, the first nip roll 311 and the second nip roll 312 may be spaced apart from each other in the same center so as to face each other vertically with the plurality of fibers interposed therebetween there is. As arranged in this way, the tension of the plurality of fibers passing between the first and second nip rolls 311 and 312 is adjusted by adjusting the rotational speed of the first and second nip rolls 311 and 312 and the process line speed ratio can be made uniform.

For example, the first nip roll 311 and the second nip roll 312 may rotate at the same rotational speed. Also, the first nip roll 311 and the second nip roll 312 may have the same diameter.

Referring to FIG. 6 , the first nip rolls 311 and the second nip rolls 312 may be formed longer than the widths of the plurality of fibers spread. Accordingly, while the plurality of fibers spread to a set width simultaneously pass between the first nip rolls 311 and the second nip rolls 312, the total tension may be uniform.

7 to 9 are flow charts of a continuous fiber composite manufacturing method according to an embodiment of the present invention.

The continuous fiber composite manufacturing method according to an embodiment of the present invention includes a fiber supply step (S110), a spreading step (S120), a fiber tension equalization step (S130), and an impregnation step (S140).

First, a fiber supply step (S110) is performed. The fiber supply step (S110) refers to a step of supplying a plurality of fibers.

Next, a spreading step (S120) is performed. The spreading step (S120) refers to a step of spreading the plurality of fibers supplied in the fiber supply step (S110) to a set width.

Next, a fiber tension equalization step (S130) is performed. In the fiber tension equalization step (S130), after the fiber supply step, the tension of the entire plurality of fibers is increased by using a nip roll (310, see FIGS. 3 to 6) that rotates while pressing the plurality of fibers up and down. refers to the level of equalization. A description of the nip roll (310, see FIGS. 3 to 6) is omitted as it overlaps with the aforementioned tension equalization device (300, see FIGS. 3 to 6).

Next, an impregnation step (S140) is performed. The impregnation step (S140) refers to a step of impregnating a plurality of spread fibers with a resin.

In addition to this, the fiber supply step (S110) may further include an individual tension adjustment step. The individual tension control step refers to a step of individually adjusting the tension of fibers when fibers are supplied from each of a plurality of bobbins.

The following [Table 1] shows the overall tension of the fiber using an individual tension control method using a mechanical creel, which is a conventional method, and a tension equalization device including first and second nip rolls according to an embodiment of the present invention. It shows the tension deviation result of the adjusting method.

[Table 1]

Comparative Example 1 is a case of an individual tension control method using a mechanical creel, which is an existing method, and it can be seen that the tension deviation at this time is 300 gf or more.

Comparative Example 2 is a case where the surfaces of the first and second nip rolls are steel nip rolls, and it can be confirmed that a high tension deviation of 572 gf appears.

In Comparative Example 3, one of the first and second nip rolls has a surface made of a silicon material, and it can be seen that a tension deviation of 286 gf appears.

Example 1 is a case according to one embodiment of the present invention, and one of the first and second nip rolls has a surface of a rubber material, specifically a urethane material, and it can be seen that a tension deviation of 165 gf appears.

Example 2 is a case according to an embodiment of the present invention, and one of the first and second nip rolls has a surface of a rubber material, specifically, a nitrile butadiene rubber (NBR) material, and it can be confirmed that a tension deviation of 186 gf appears. can

As such, in the case of Examples 1 and 2 of the present invention, it can be confirmed that the tension deviation of the fiber is significantly improved compared to Comparative Examples 1, 2, and 3, and as a result, the effect of significantly improving the quality and mechanical properties of the UD sheet can be expected to exist.

As described above, according to the configuration and operation of the present invention, the quality of the continuous fiber composite can be expected to be improved, and the mechanical properties can be remarkably improved.

According to the present invention, it is possible to improve the individual fiber tension deviation of the existing mechanical creel. tension can be equalized.

In addition, according to the present invention, unlike the conventional method of adjusting the tension of each of the plurality of bobbins in the fiber supply process, the tension of the plurality of fibers can be simultaneously adjusted at once before and after the spreading process after the fiber supply process. As a result, it is possible to improve the quality and mechanical properties of the final product, that is, the continuous fiber composite, that is, the UD sheet.

As described above, the present invention has been described with reference to the drawings illustrated, but the present invention is not limited by the embodiments and drawings disclosed herein, and various modifications are made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that variations can be made.

S110: fiber supply step
S120: spreading step
S130: Fiber tension equalization step
S140: impregnation step
10: continuous fiber composite manufacturing device
100: fiber supply unit
110: bobbin
120: individual tension control unit
200: spreading unit
300: tension equalization device
310: nip roll
311: first nip roll (or rubber nip roll)
312: second nip roll (or steel nip roll)
330: first guide bar
340: first guide bar height adjusting unit
350: second guide bar
360: second guide bar height adjusting unit
400: impregnation part

Claims (16)

A fiber supply unit including a plurality of bobbins supplying a plurality of fibers;
a spreading unit for spreading the plurality of fibers supplied from the fiber supply unit to a set width; and
an impregnation unit for impregnating the spread fibers with a resin;
As a tension equalization device of a continuous fiber composite manufacturing device comprising a,
The tension equalization device,
A nip roll positioned on a path through which the plurality of fibers are transported to the impregnating unit, and pressing and rotating the plurality of fibers up and down to uniformly adjust the tension of the plurality of fibers;
Tension equalization device of the continuous fiber composite manufacturing device comprising a.
According to claim 1,
The nip roll,
Characterized in that located between the fiber supply unit and the impregnation unit
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 1,
The nip roll,
It is located between the exit side of the spreading part and the inlet side of the impregnation part, and simultaneously pressurizes the plurality of fibers spread to the set width up and down.
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 1,
The nip roll,
a first nip roll rotating to press the upper portion of the plurality of fibers; and
a second nip roll rotating to press the lower portion of the plurality of fibers;
Tension equalization device of the continuous fiber composite manufacturing device comprising a.
According to claim 4,
One of the first and second nip rolls is a rubber nip roll having a rubber surface,
Characterized in that the other one of the first and second nip rolls is a steel nip roll whose surface is a steel material
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
a first guide bar positioned in a direction in which the plurality of fibers are introduced toward the first and second nip rolls and guiding an angle at which the plurality of fibers are introduced toward the first and second nip rolls;
Tension equalization device of the continuous fiber composite manufacturing device further comprising a.
According to claim 6,
The first guide bar,
Among the first and second nip rolls, the surface is located at a height closer to the steel nip roll made of steel material than the rubber nip roll whose surface is made of rubber material. Characterized in that
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
a second guide bar positioned in a direction in which the plurality of fibers are discharged through the first and second nip rolls and guiding an angle at which the plurality of fibers are discharged from the first and second nip rolls;
Tension equalization device of the continuous fiber composite manufacturing device further comprising a.
According to claim 8,
The second guide bar,
Among the first and second nip rolls, the surface is located at a height closer to the steel nip roll made of steel material than the rubber nip roll whose surface is made of rubber material. Characterized in that
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
The first nip roll and the second nip roll,
Characterized in that the plurality of fibers are spaced apart from each other so as to face each other up and down with the plurality of fibers interposed therebetween
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
The first nip roll and the second nip roll,
characterized by rotating at the same speed
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
The first nip roll and the second nip roll,
characterized by having the same diameter
Tension equalization device of continuous fiber composite manufacturing device.
According to claim 5,
The first nip roll and the second nip roll,
Characterized in that the plurality of fibers are formed longer than the spread width size
Tension equalization device of continuous fiber composite manufacturing device.
A fiber supply unit including a plurality of bobbins supplying a plurality of fibers;
a spreading unit for spreading the plurality of fibers supplied from the fiber supply unit to a set width;
an impregnation unit for impregnating the spread fibers with a resin; and
Tension including a nip roll located on a path through which the plurality of fibers are conveyed to the impregnation unit, pressing and rotating the plurality of fibers up and down, and uniformly adjusting the tension of the entire plurality of fibers equalization device;
Continuous fiber composite manufacturing apparatus comprising a.
According to claim 14,
Individual tension adjusting units for adjusting individual tensions of the fibers supplied from each of the plurality of bobbins;
Continuous fiber composite manufacturing apparatus comprising a.
A fiber supply step of supplying a plurality of fibers;
a spreading step of spreading the plurality of fibers supplied in the fiber supply step to a set width; and
an impregnation step of impregnating the plurality of spread fibers with a resin;
Including,
After the fiber supply step, a tension equalization step of uniformly adjusting the tension of the plurality of fibers by using a nip roll that rotates while pressing the plurality of fibers up and down;
Continuous fiber composite manufacturing method further comprising a.

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